I think you are right about general apathy. What are our MEP's doing most of the time? We seem to see so little reporting and do we even recognise their names?
They do seem to do some things if the recent proposed legislation for internet copyright tightening is anything to go by. Perhaps the special interest groups get to use them to lobby stuff through whereas the rest of us wonder what they do?
Given Brexit I expect turnouts will be higher this time. If not, or if lower, that will really send the message most people are sick of all of it. Remain campaigners started the ball rolling by making this Ref2 but they've had their thunder stolen with Farage coming back and the potential for voting to go against them. I strongly suspect a good portion of votes to Farage as so many are sick of it all and will do it as a message...which if I'm honest is what I'm thinking of doing.